Bi-directional cross connect
CA 2355447 A1 · Owner: Chang, Kok-Wai · Inventors: Chang, Kok-Wai; Chen, Jyehong; Tai, Kuochou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wavelength interleaving cross-connects pass a first optical signal including a first set of, optical frequencies in a first direction and a second optical signal including a second set of, optical frequencies in a second direction. In one embodiment the first , optical signal, when input to a first input/output (I/O) port, is routed from the first I/O port to a third I/O port. The first, optical signal when input to a fourth I/O port, is routed from the fourth port to a second I/O port. The second optical signal when input to the second I/O port, is routed from the second I/O port, to the third I/O port. The second optical signal when input to the fourth I/O , port, is routed from the …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.